02-06-2006, 04:40 AM
Patient A is suffering from carbon monoxide (CO) poisoning and patient B has iron deficiency anemia. Assume
that CO is binding 50% of the available O2-binding sites on the hemoglobin, and that the anemic patient has 50%
of the normal amount of hemoglobin. Patient A is more at risk of tissue hypoxia because CO causes
A. a decrease in diffusing capacity
B. a decrease in the P50 of Hb for O2
C. a greater decrease in the concentration of arterial oxygen
D. a reduced rate of O2 binding to available Hb
E. arterial hypoxemia, while anemia does not
that CO is binding 50% of the available O2-binding sites on the hemoglobin, and that the anemic patient has 50%
of the normal amount of hemoglobin. Patient A is more at risk of tissue hypoxia because CO causes
A. a decrease in diffusing capacity
B. a decrease in the P50 of Hb for O2
C. a greater decrease in the concentration of arterial oxygen
D. a reduced rate of O2 binding to available Hb
E. arterial hypoxemia, while anemia does not